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Chemistry Study Guide physical change chemical change electron nucleus proton neutron neutral chemical bonds atomic number mass number periodic table mixture chemical formula chemical reaction product chemical equations acid base litmus pH Scale indicator neutralization reaction -Know the difference between a physical change and a chemical change and be able to give examples -Know parts of the atom and be able to describe characteristics of each -Understand the relationship between atoms and molecules/elements and compounds -Know how elements are arranged on a Periodic Chart ex: rows/columns, metals/nonmetals, solids, gasses, liquids, man-made, symbols, atomic number, atomic mass -Know what chemical symbols and formulas are and how to read the formulas -Recognize symbols for basic elements and compounds including Ca (calcium), C (carbon), H (hydrogen), O (oxygen), CO (carbon monoxide), CO2 (carbon dioxide), H2O (water) -Determine the number of atoms in a compound when given its formula -Know about acids and bases -Describe properties of acids (e.g., sour taste, one or more hydrogen atoms, turns blue litmus red) -Describe how litmus paper is used to determine whether a substance is an acid or a base -Predict which household substance will turn blue litmus paper red